Supplement to the Companion to the latest edition of the British Pharmacopoeia : including the additions, 1890 / by Peter Wyatt Squire and Alfred Herbert Squire.

Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Supplement to the Companion to the latest edition of the British Pharmacopoeia : including the additions, 1890 / by Peter Wyatt Squire and Alfred Herbert Squire. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    14/32 (page 10)
    FERRI CARBONAS SACCHARATA. ( Companion, page 193.) A Ferrous Carbonate pill has been introduced under the following title : PILULA FERRI. formula is akeady given Companion, p. 194, under Pil. Ferri (Bkud), (B.P.C.). ' FERRUM. ( Companion,''^ page 189.) The following preparation has been introduced :— SYRUPUS FERRI SUBCHLORIDI. Iron wire, 300 grs.; Hydrocliloric Acid, 2 oz. ; Citric Acid, 10 grs. ; Distilled Water, 10 drms.; Syrup, a sufficiency; mix the Hydrochloric Acid with 1 oz, of the Water in a flask, add the Iron Wire, and apply heat gently until action ceases. Eemove the flask from the source of heat, add the Citric Acid, and filter the solution through paper into 10 oz. of the Syrup, then pass the remainder of the Water through the small filter into the Syrup. To the product add sufficient Syrup to form 1 pint of the thoroughly mixed fluid. Its specific gravity should be about 1-340. The above quantities heated to 150° F. for 2 hours, by which time effervescence had entirely ceased, left a residue weighing 64 grs. ; a fluid drachm of the finished Syrup will therefore contain about Z\ grs. of anhydrous Ferrous Chloride. The Ofiicial term Subchloride has possibly been chosen to distinguish this preparation from a Syrupus Ferri Protochloridi of varying strengths, which has been recommended at intei-vals since its first mention by Phillips in 1845. It would appear that the formula for this Syrup has been so arranged that the P.P. maximiim dose will contain the same quantity of Iron (1^ grs.) as the P.P. maximum dose of Tinctura Ferri Perchloridi. 60 minims are equal ia Iron to 30 minims of Tracture of Steel. B.P. Dose.—J to 1 fluid drachm. GELATINE. ( Companion,'''' page 211.) This is now Official under the title— GELATINUM. It is described as the air-dried product of the action of boiling Water on gela- tigenous animal tissues, such as sldn, tendons, ligaments, and bones. In trans- lucent sheets or shreds. The solution ia hot Water is colourless and inodorous, and solidifies to a jeUy on cooling. These characters apply more particularly to French Gelatine, which is less coloured than that made in this countiy, although one British sample in hot Water had less odour than the French. Commercial Gelatine varies considerably in its gelatinizing power, and some test like the following would be useful as a standard. Place 5 grs. of Gelatine in a test-tube (f inch diameter) with 250 grains of Water for half an hour, warm gently until dissolved, then place the test-tube in water at 60° F., and leave it undisturbed for 30 minutes, by which time a jelly should be formed of such consistence that it will remain in position if the test-tube be inverted. There is no difficulty in obtaining Gelatine answering this test. '' Gelatine is insoluble in Alcohol and Ether. It dissolves in Acetic Acid. Its